i think the reason that some of the love marriages don't work, is because there is a lack of understanding in the relationship... love does not make problems work... you need to work on them, as a couple...
i find many of the youngsters live in their own world, and think that if you love someone, that should be enough to get past all the problems... and the thing is, it's not that things change drastically when you are in a love marriage as compared to the arranged marriage.. you still have similar issues... there are still conflicts, because you still have two different people living together... problem is, many times people find it hard to find a middle ground...
love marriages can work just as well as any arranged marriage, provided people have understanding and communcation, and willingness to make things work, together...!